1 Answer

Check the wheel bearings and hub bearing assemblies - sometimes the grinding may occur with new brakes and worn / faulty / loose hub or wheel bearings - causing a slight sideways loading of the wheel and brake rotor when under braking conditions.
Check the many on-line auto parts sources, such as; www.autopartswarehouse.com, www.drivewire.com or www.rockauto.com for the replacement parts.